Download The AccuMate has what is known internationally as

The AccuMate 612
The 4 – stage AccuMate 612 has what is known internationally as the IUoU
charging program.
First the charger must sense the correct connection of a battery of at least 2V
to allow it to initiate the IUoU program, both for technical and safety reasons.
This is called the "Initialization stage".
Then the 3-stage IUoU program can engage :
"The "I" stands for the constant current "bulk charge" first stage which
terminates automatically when the battery voltage reaches 14,4V.
Then the first "U" stands for the voltage-controlled subsequent absorption
stage during which the charge voltage is held just below 14,4V until the
charge current entering the battery has fallen (as the state of charge
approaches "full"), to between 300 & 400 mA, at which stage the battery is
fairly close to full charge.
The "o" between the first "U" & second "U" simply indicates a change between
one voltage controlled stage and another with different parameters.
The second "U" is the voltage-limited "float charge" maintenance stage during
which the battery can draw current up to between 300 & 400mA within a
"floating" voltage which is limited to 13,5V, to top up the charge and maintain
the battery (and support any attached load such as an electronic alarm) at full
charge.
Should the battery require more than the current available in the maintenance
mode, the charge cycle reverts automatically to the absorption stage until the
required charge current again falls to within that available in the maintenance
mode allowing this mode to take over again.
This feature is known as being "Fully battery-interactive".
The AccuMate 612 has automatic electronic fuseless protections against
wrong connections & short-circuited output, cuts off the output automatically in
the event of disconnection at the battery, and suppresses the generation of
sparks in the event of short-circuited battery clips.
The AccuMate 612 charger monitors its own internal heat, and if for any
reason (like blocked vents) this increases to the pre-set limit (which is set to
avoid user concern or discomfort arising from a too-hot casing as well as to
avoid heat stress on the electronics) then the output current is automatically
reduced to a level consistent with not exceeding the internal temperature limit.